1131320203311 has 16 divisors (see below), whose sum is σ = 1519508114784. Its totient is φ = 748673393664.

The previous prime is 1131320203217. The next prime is 1131320203339. The reversal of 1131320203311 is 1133020231311.

It is a happy number.

It is not a de Polignac number, because 1131320203311 - 2¹⁵ = 1131320170543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131320203411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11160391 + ... + 11261303.

It is an arithmetic number, because the mean of its divisors is an integer number (94969257174).

Almost surely, 2^{1131320203311} is an apocalyptic number.

1131320203311 is a deficient number, since it is larger than the sum of its proper divisors (388187911473).

1131320203311 is a wasteful number, since it uses less digits than its factorization.

1131320203311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128330.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1131320203311 its reverse (1133020231311), we get a palindrome (2264340434622).

The spelling of 1131320203311 in words is "one trillion, one hundred thirty-one billion, three hundred twenty million, two hundred three thousand, three hundred eleven".